Scribing fixture



25, 1946. E, HOCHREITER 2,402,890

SCRIBING FIXTURE Filed Jan. 8, 1944 4 Sheets-Sheet l A TTORNE Y uu. ULU WIL l WML 1m o L lL U iv; L H 9.

June 25, 1946.

E. HocHRElTER 2,402,890

SCRIBING FIXTURE Filed Jan. 8, 1944 4 Sheets-Sheet 2 i f H :9|

- 4 xk m Ir I L 12 Il l lh Il INVENTQR Eduard Hoehrezten ATTORNEY June 25, 1946. E, HOCHREITER 2,402,890

SCRIBING FIXTURE Filed Jan. 8, 1944 4 Sheets-Sheet 3 A TTORNE Y June 25, 1946.

E. HOCHREITER SCRIBING FIXTURE Filed Jan. 8, 1944 4 Sheets-Sheet 4 INVENTOR Edam@ Hochreen ATTORNEY llUU Patented June 25, 1946 OUCH bil SCRIBING FIXTURE Edward Hochreter, Cynwyd, Pa., assignor to Edward G. Budd Manufacturing Company, Philadelphia, Pa., a corporation of Pennsylvania Application January 8, 1944, Serial No. 517,509

7 Claims. l

The invention relates to a fixture adapted for inscribing the locations of trim lines or other markings on workpieces.

More particularly, the invention refers to a fixture for inscribing the trim lines on elongated profiles or sections which are curved in one or more planes.

Among the objects of the invention is a scribing fixture which can easily and speedily be operated even by unskilled or semi-skilled persons, which insures very accurate marking of the trim lines, which permits the use of the forming dies for holding the articles to be inscribed, and which permits easy and speedy adjustment for difierent articles.

These and other objects of the invention are outstandingly achieved by a. xture provided with means for holding a support for the articles to be marked or inscribed and with one or more uni.. versally adjustable guides for a scribing tool.

The aforesaid and further features of the invention, as well as the advantages thereof, will be fully understood from the illustration of an embodiment in the attached drawings and from the following detailed description of same.

In the drawings:

Figure 1 is a side elevation of the new device at a substantially reduced scale;

Figure 2 is a plan view of the same device;

Figure 3 is a fragmentary plan view on a larger scale than Figure 2, showing in full lines the component parts in a middle position and in dotand-dash lines certain parts angularly adjusted;

Figure 4 is an elevation on the scale of Figure 3 partly in section along lines 4-4 and 4'4', respectively, of Figure 3 with a die or form and a workpiece in place and with a scribing tool in operation;

Figure 5 is a section along line 5-5 of Figure 3 showing in full lines the middle position of the parts and in dotted and dot-and-dash lines, respectively, the tool guide proper in two different angularly adjusted positions:

Figure 6 is a section along line 6-6 of Figure 2 on the scale of Figures 3 to 5 with a die or form and a workpiece in place;

Figure '7 is a fragmentary section along line 1-1 of Figures 2 and 6 on a still larger scale; and

Figure 8 is a fragmentary perspective view of a form or die, o1' a workpiece thereon and of the lower end of a scribing tool, on about the scale of Figures 4 and 6.

Supported on the floor Ill by a plurality of pairs of legs Il are a pair of parallel beams I2 tied 10 extend into the passageways I 6.

40 side of the top plate 29.

table I3. The latter may, for convenience of manufacture, shipping and storage, consist of several units joined together along lines I4.

Gibs I5 forming with the top of the table I3 5 undercut guideways I6 are removably secured Aby bolts l1 to the long margins of the table. Along the center line of the table is secured a rack I8. Two bridge-like structures I9 rest by means of legs 20 and feet 2| on the table I3. The feet 2| A bracket 22 forming an integral part of the structure I9 and screws 23 serve for firmly and immovably holding a die or checking form 24.

Each foot 2| has screwed therein a bolt 25 which engages a plate or Washer 2B guided in a downwardly open recess of the foot. The plates 2B enter shallow grooves 21 extending parallel to the rack I8 and the passageway I6. Upon loosening the screws 25, the structures I9 may be moved along the table to any desired position and there secured in place by tightening the screws so that the structures I9 are held by frictional engagement of the plates 26 with the bottom walls of the grooves 21 and of the feet 2l with the upper wall-s of the passageways I6.

Four further bridge structures 28 of a diierent design are located on the .table I3. The number of structures 28 depends upon the number of lines to be inscribed on a given workpiece.

30 Each structure 28 comprises a top plate 29, legs identical with the screws 25 and plates 26 described in connection with the structures I9.

A transversely extending shaft 32 is rotatably supported in one of the legs 30 of each structure 28 and in bearings 33 connected with the under- One end of the shaft 32 extends beyond one of the lateral margins of the table I3 and carries a hand wheel 34. A pinion 35 is secured to the shaft 32 between the two bearings 33 and is in mesh with the rack I8.

When the screws' 25 are loosened, .the structure 28 can be moved along the table exactly to any desired position by turning the hand wheel 34. Thereafter, it may be secured in place by again tightening the screws 25.

Each bridge structure 28 carries a frame structure 36 consisting of a bottom plate 31, two uprights 38 and a top member 39. The bottom plate 31 rests on top of the plate 29 of the structure 28 and engages a central hole of the latter together by strips I2' carrying a long plate or 55 by means of a vertical pin 40 so as to allow rollUUll tation about the axis of said pin. The plate 31 is provided with two arc-shaped slots 4I extending concentrically to the pin 48. A screw bolt 42 has its shank extending through each slot 4I, is screwed into one of a plurality of holes 43 provided in the plate 29 and has its head in engagement with the top of the plate 31. The pin 48, the slots 4I and the screws 42 permit the rotation of the structure 36 relative to the structure 28 and, consequently, relative to the longitudinal direction of the table I3, to any desired angular position and the securement in such position. Several such positions are shown in Figures l and 2 of the drawings and two positions are indicated in Figure 3 by full lines and dot-and-dash lines, respectively.

One shoe 44 is slidable on each of the uprights 38. The shoes 44 have their outer ends vertically slotted so that they can be firmly clamped against the respective upright 38 by means of a transversely extending bolt and nut 45. The inner ends of the shoes 44 are horizontally slotted at 46 and provided with a horizontal boring 41. Supported in each boring 41 is a pin 48 which is immovably held in place upon clamping the ends of the shoe 44 separated by the slot 46 together by means of the nut 49 screwed on the bolt 49, which latter is held in the shoe by the pin 50.

The pins 48 are rigidly secured by means of a screw or dowel 5I each to the ends 52 of a U- shaped member 53, Except for the ends 52, the member 53 is slotted at 54. The juxtaposed walls of the slot are exactly parallel and the slot has an exact predetermined width.

It will by now be understood that the slot'l 54 of each member 53 can be brought into any desired longitudinal and angular position relative to the table I3 by moving the structure 28 along the table, by turning the structure 36 relative to the strucure 28 about the vertical axis of pin 48, by raising or lowering the member 53 with its shoes 44 along the uprights 38, and by swinging the member 53 with its pins 48 in the shoes 44 about the horizontal axis of the pins.

The form or fixture 24 has its upper marginal portion 55 shaped exactly to the contour of the workpiece 56 to be marked or inscribed. Marked on the form 55 by the lines 51, 58 (Figure 8) are the locations and the directions of the trim lines 51', 58' to be inscribed on the workpiece.

The form or fixture 24 may be the forming die which had been used for stretch-forming the article to be inscribed, Such forming may, for instance, be carried out by the methods and means disclosed in applicants application for Letters Patent Means for and method of forming articles, Serial No. 514,573, filed December 16, 1943.

The operation of the new device is as follows:

.At first, the form 24 is secured in place on the table I3 by means of the structures I9 and the screw 23 thereon. Hereupon, the structures 28 are moved along the table I3 to the location of the marking lines, such as the lines 51 and 58, on the form 24, and the structures 36 and members 53 are so adjusted as to angular position and height that the slots 54 in the members 53 have one wall each exactly coplanar with the respective line.

The exact adjustment is aided by the use of the scribing tool 59, the shank of which fits slidingly but practically Without play into the slot 54. One end of the tool 59 has a sharp point at 68, whereas the other end is provided with a handle 6I. One of the side surfaces of the tool 59 is 4 plane throughout the length of the tool, that is, to the point 68 (see Figure 8). It is this plane side of the tool 59 which slides on the wall of slot 54 coplanar with the respective marking line on the form 24.

After thisadjustment, one workpiece 56 after the other is placed on the form or fixture 24 and the tool or tools 59 are moved in the respective slots 54 of the members 53 so that the trim lines, such as 51', 58' (Figure 8), are inscribed on the workpiece 56 at the exact location of the corresponding lines, such as 51, 58, on the form 24.

It will be understood that two or more workmen may operate the machine so as to speed up production. There may be one workman for each line to be inscribed on a specific workpiece.

The change-over from one form or xture to another can easily and speedily be carried out by simply securing the new form on the structures I9 and by adjusting the members 53 in the same manner as just described.

The invention is not restricted to the details of the illustrated and described embodiment, but all modications based on the principles and the spirit of the invention are intended to be covered by the attached claims.

What is claimed is:

l. A device for marking trim lines on articles comprising: a table; a structure; means on said table and said structure for guiding the latter on the former along a substantially straight path; means for holding a workpiece on said table; and means angularly adjustable on said structure for guiding a scribing tool across the workpiece and arranged to leave a free space for a threedimensional workpiece between it and the table.

2. In a device of the class described: a base; a structure; means on said base and said structure adapted to support and guide the latter on the former along a substantially straight path; means adapted to hold a workpiece flxedly relative to said table; a second structure supported on said first structure rotatably about an axis extending substantially vertically to said path; guiding means for a tool supported angularly adjustably about an axis extending generally transveiisely to said first-named axis and to the said pa h.

3. In a device according to claim 2, means adapted for adjusting the perpendicular distance of said tool guiding means from said base.

4. In a device of the type described: a. base; a structure; means for guiding said structure on said base along a predetermined path and securing it at any desired location of said path; a second structure supported by said first structure angularly adjustable about an axis extending about perpendicularly to said path and means for securing said two structures together in any desired angular position: said second structure comprising at least one member extending in the general direction of said axis and away from said rst structure and said base; guiding means for a tool; and means for holding said guiding means on said member adjustably along the length of the latter and also angularly adjustable about an axis extending transversely to the flrst-named axis.

5. In a device of the type described: a base; means for holding a workpiece in predetermined position on said base; a plurality of structures provided with means for guiding a scribing tool; means on said base and said structures for guiding each one of the latter individually on the former and for securing them in different posi- Uu ULUWILHHUHL IHOIMUHMLVM OUCH bil HUUH tions along a predetermined path; the device permitting the inscription of a plurality of marking lines in the exact desired spacing and angular position on one workpiece after the other.

6. In a device of the type described: a base; at least one structure provided with means for guiding a scribing tool; guiding means on said lbase for said structure; and further means guided by said last-named guiding means adapted to termined position.

7. In a scribing xture: an adjustably supported member; a slot with parallel walls in said member; a scribing tool having a pair of parallel surfaces tting between and slidably guided by said walls of said slot; one of said parallel surfaces of said tool extending unbrokenly to the point of the tool so that one of the walls of said slot is coplanar with the line drawn by the tool when moved along the slot.

EDWARD HOCHREITER. 

